Already out promoting the October 24th release of their new movie, Zac Efron and Ashley Tisdale joined fellow HSM stars at Disney’s “High School Musical 3: Senior Year” Ultimate Fan Pep Rally. Held at the El Capitan Theatre in Hollywood on Saturday (August 23), Zac and Tizzie teamed up with pals like Chris Warren Jr., Kaycee Stroh and Olesya Rulin - with the group doing their best in pumping up an already ecstatic crowd.

Source: Celebrity Scandals: The Gossip Girls